OS Command Injection in Cisco Nexus 9000 Series Fabric Switches ACI Mode

1) OS Command Injection

EUVDB-ID: #VU56100

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1584

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation. A administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Nexus 9000 Series Switches in ACI Mode: All versions

Cisco NX-OS: All versions

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_in_aci_mode:*:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:*:*:*:*:*:*:*:*

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-naci-mdvul-vrKVgNU

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.